8050 loss of power with black smoke
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=208643
Printed Date: 28 Oct 2025 at 4:14pm
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Topic: 8050 loss of power with black smoke
Posted By: Johnwilson_osf
Subject: 8050 loss of power with black smoke
Date Posted: 23 Oct 2025 at 5:16pm
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Foreman was taking the 8050 PD and chisel plow to another field, and couldn't pull the small hill in between. Lots of black smoke coming from the exhaust. He changed from 4th into 3rd, and got the same results. I get back to the farm and give it a try, and i can pull the hill in 2nd, with the tractor responding to all throttle input. In 3rd or higher, tractor slows forward motion, and belches tons of black smoke. Not quite sure where to stay looking. Transmission is correct oil level. Rear end is correct oil level. Engine is correct as well. Is my turbo not pushing air, or could my torque limiter be slipping? Thank you for your thoughts. John ------------- Allis Express: Eastern PA on Rt 80 8050, 8010, 6080, 190, D14, DA 6035, AA 6690, 5650, Gleaner F2 |
Replies:
Posted By: Lynn Marshall
Date Posted: 23 Oct 2025 at 5:46pm
| Take the hose off at the front of the turbo and look there. |
Posted By: injpumpEd
Date Posted: 23 Oct 2025 at 5:49pm
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Look over the intake manifold, making sure no plugs are missing, or gasket blown, hard to see on the intercooled ones between the valve cover and intercooler, can look from the top. Blown crossover hose? Turbo locked up? Putting a pressure gauge in the intake manifold is one of the first steps to diagnosing a low power issue on a turbo diesel. ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: TedN
Date Posted: 23 Oct 2025 at 6:06pm
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I would try changing the fuel filter first. Ted ------------- 190XTD seriesIII, 190XTD seriesI, maroon belly 7000, 190XTD series??? project(or maybe parts) |
Posted By: 8070nc
Date Posted: 23 Oct 2025 at 6:11pm
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This may sound elementary and probably isnt the problem but to cover all the bases i would ensure the air cleaner and hose to turbo isnt stopped up ------------- 1984 80780 1957 D14 DES 300 with 25000 engine 616 tractor |
Posted By: jvin248
Date Posted: 23 Oct 2025 at 6:53pm
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. I have a lowly WD that I think the air cleaner is stopped up. Kind of similar symptoms. Waiting for a little warmer day to remove, disassemble, and power wash the screen material. . |
Posted By: DougG
Date Posted: 23 Oct 2025 at 6:54pm
| Air filter and restrictions , go from there |
Posted By: nella(Pa)
Date Posted: 23 Oct 2025 at 6:57pm
| bad seal in turbo? |
Posted By: Johnwilson_osf
Date Posted: 23 Oct 2025 at 7:08pm
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Thank you for all the options. I will look into them at first light tomorrow. I changed all the filters about 20 hours ago in preparation for fall harvest and tillage. I will have to get into the intake beyond the air filter to see if there are any blockages. What would a turbo problem look like? Will i notice anything in particular when i pull off the air intake hose? John ------------- Allis Express: Eastern PA on Rt 80 8050, 8010, 6080, 190, D14, DA 6035, AA 6690, 5650, Gleaner F2 |
Posted By: AC7060IL
Date Posted: 23 Oct 2025 at 8:38pm
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Before you pull air intake from turbo, go first to the 8050’s engine’s air filter canister & inspect for a bird’s nest built around outside of air filters?? Have had similar results if tractor has been dormant for months. Sparrows & black Starlings seem to love the Allis tractors engine air intakes before filter. They can enter thru pre-cleaner vents & pack their nesting/straw/twigs tight inside it.    |
Posted By: SteveM C/IL
Date Posted: 23 Oct 2025 at 8:49pm
| hard to imagine a bird being able to get through the screen on the asperatoron an 8000 |
Posted By: Tenn allis
Date Posted: 24 Oct 2025 at 6:23am
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As said start at the air cleaner and work your way to the turbo been 4 or 5 years since I’ve been under the hood of an 8000 series but should be a hose clamp on the inlet side of the turbo loosen that clamp and wiggle that 3 to 4 inch hose off the turbo Once it’s off you can see the vanes of the turbo should be able to spin it by stick your finger in there if it spins freely and there’s no play in the shaft fire the engine and make sure it’s spinning while running My experience with a turbo going down we got a lot of grey smoke and loss of power but that was on a 4450 John Deere |
Posted By: nella(Pa)
Date Posted: 24 Oct 2025 at 7:31am
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My experience with a turbo going down we got a lot of grey smoke and loss of power but that was on a 4450 John Deere [/QUOTE] That was my same experience when I drove tractor trailer for UPS, I was going N. on the Jersey tp. above Newark to Meadowlands and the smoke was so dense I could not see the cars headlights in my mirrors at night, bad seal in the turbo.
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Posted By: WF owner
Date Posted: 24 Oct 2025 at 8:49am
This, to me, seems to indicate your problem is in the transmission.
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Johnwilson_osf wrote:Posted By: 8070nc
Date Posted: 24 Oct 2025 at 9:50am
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Somebody may have suggested a boost guage i dont know. That would definitely determine if the black smoke is lack of air ir load from something in the driveline tightening up ------------- 1984 80780 1957 D14 DES 300 with 25000 engine 616 tractor |
Posted By: DrAllis
Date Posted: 24 Oct 2025 at 10:27am
| I believe it is a lack of air/turbo boost. A failed turbo, a failed boost rubber hose, missing plug on the intercooler (the BIG plug...likely), blown intercooler/intake gasket to the cylinder head (seen many of those), birds nest in the air cleaner intake (not likely on an 8000). Lastly, the intra-advance inside the injection pump could very well have failed causing the pump timing to retard from 36 degrees down to 19 degrees. I've had two of those over the years and it melted piston tops, requiring a major OH of the engine and then figure out it was the injection pump that caused it. Lastly, you could have a blown head gasket or an injector tip that has blown off. These two problems take a trained "ear" to detect, and if not dealt with quickly can cause you many extra $$$$$$$ to repair. |